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A conversational agent is an agent that interacts with users using natural language interface. Especially in Internet space, its role has been recently highlighted as a virtual representative of a web site. However, most conversational agents use simple pattern matching techniques for their answer without considering user goals and thus give user an(More)
— In this paper, we advocate addressing the communication overhead problem between OpenFlow controllers and OpenFlow switches due to table-miss in a flow table. It may cause the communication overhead between controllers and switches because a switch has to send packet-in message to a controller for processing table-missed flows. We propose a simple flow(More)
Recently, there has been extensive work on the construction of fuzzy controllers for mobile robots by a genetic algorithm (GA); therefore, we can realize evolutionary optimization as a promising method for developing fuzzy controllers. However, much investigation on the evolutionary fuzzy controller remains because most of the previous works have not(More)
In this paper, we evolve artificial neural networks (ANNs) with speciation and combine them with several methods. In general, an evolving system produces one optimal solution for a given problem. However, we argue that many other solutions exist in the final population, which can improve the overall performance. We propose a new method of evolving multiple(More)
For a service robot to be more human friendly, it is required to have various emotional interactions with human. Inspired from both neuroscience and cognitive science, this paper proposes a dynamic robot affective system that can have various emotional states at the same time and express those combined emotions just like humans do. The system comprises(More)